Patent US4370904A successfully refreshed from Google Patents.
US4370904A
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Method and apparatus for controlling the torque of an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1981-05-07
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Granted: 1983-02-01
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Expires: 2001-05-07
Abstract
Abstract The signal initiating a reduction of engine torque during gear shift is derived from a monitoring of the engine speed. Specifically, the decrease in torque is initiated when engine deceleration, as determined by the negative speed gradient, exceeds a predetermined value. The torque decrease can, as preferred, take place only if a gear shift occurs, or it may take place independent of gear shift in which case high decelerations caused, for example, by rapid application of the brakes, also cause the decrease.
Inventors
- 👤 Alfred Muller
- 👤 Manfred Schwab
- 👤 Walter Stroh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:18
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/145; F02P5/15; F02P5/1502; F02P5/1504; F02P5/155; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/40
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
In an internal combustion engine having an automatic transmission and means for decreasing the output torque of said engine in response to a torque reducing signal; apparatus for generating said torque reducing signal whenever a gear-shifting operation of said automatic transmission takes place, comprising first means (11,14) for generating a deceleration signal corresponding to the rate of decreases with respect to time of the speed of said internal combustion engine; and second means (11,12,13) for generating a reference deceleration signal value representative of a threshold below which the value of deceleration is too low to correspond to the occurrence or imminence of a gear-shifting operation of said transmission; third means (15,16,17) connected to said first and second means for furnishing said torque reducing signal when said deceleration signal is indicative of an engine deceleration exceeding said reference deceleration signal value.
Claim 2
Dependent Claim
140 words
In an internal combustion engine having an automatic transmission and means for decreasing the output torque of said engine in response to a torque reducing signal; apparatus for generating said torque reducing signal whenever a gear-shifting operation of said automatic transmission takes place, comprising first means (11,14) for generating a deceleration signal corresponding to the rate of decreases with respect to time of the speed of said internal combustion engine; and second means (11,12,13) for generating a reference deceleration signal value representative of a threshold below which the value of deceleration is too low to correspond to the occurrence or imminence of a gear-shifting operation of said transmission; third means (15,16,17) connected to said first and second means for furnishing said torque reducing signal when said deceleration signal is indicative of an engine deceleration exceeding said reference deceleration signal value.
Claim 3
Dependent Claim
35 words
Apparatus as set forth in claim 1, wherein said second means comprises timing means (16) for limiting said furnishing of said torque reducing signal to a predetermined time period following generation of said deceleration signal.
Claim 4
Dependent Claim
19 words
Apparatus as set forth in claim 2, wherein said predetermined time period varies as a function of engine speed.
Claim 5
Dependent Claim
19 words
Apparatus as set forth in claim 2, wherein said predetermined time invertal varies as a function of engine load.
Claim 6
Dependent Claim
19 words
Apparatus as set forth in claim 2, wherein said predetermined time interval varies as a function of engine deceleration.
Claim 7
Dependent Claim
116 words
Method for generating a torque reducing signal for activating torque reducing apparatus in an internal combustion engine of a vehicle equipped with an automatic transmission whenever a gear-shifting operation of said automatic transmission takes place, comprising the steps of: generating a deceleration signal corresponding to the rate of change with respect to time of then-present engine speed; and generating, in response to engine speed and engine load signals, a deceleration reference signal value representative of a threshold below which the value of deceleration is too low to correspond to the occurrence or imminence of a gear-shifting operation of said transmission, and generating said torque reducing signal when said deceleration signal exceeds said deceleration reference signal value.
Claim 8
Dependent Claim
116 words
Method for generating a torque reducing signal for activating torque reducing apparatus in an internal combustion engine of a vehicle equipped with an automatic transmission whenever a gear-shifting operation of said automatic transmission takes place, comprising the steps of: generating a deceleration signal corresponding to the rate of change with respect to time of then-present engine speed; and generating, in response to engine speed and engine load signals, a deceleration reference signal value representative of a threshold below which the value of deceleration is too low to correspond to the occurrence or imminence of a gear-shifting operation of said transmission, and generating said torque reducing signal when said deceleration signal exceeds said deceleration reference signal value.
Claim 9
Dependent Claim
22 words
Method as set forth in claim 6, further comprising the step of interrupting said torque reducing signal after a predetermined time interval.
Claim 10
Dependent Claim
24 words
A method as set forth in claim 7, wherein said predetermined time interval varies in dependence upon a selected operation parameter of said engine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |